The earliest thing I remember Billy Crystal from was an old tv comedy called “Soap”. It was a spoof on soap operas or something, IIRC (I was pretty little at the time).
I also remember when Sha-Na-Na had a syndicated weekly television show.
“Soap” was a lot of fun!
Ditto that. Wasn't it supposed to be sort of a knockoff of the Monkees show?